The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2013
Filed:
Apr. 24, 2008
Koutarou Suzuki, Tokyo, JP;
Masayuki Abe, Tokyo, JP;
Tatsuaki Okamoto, Tokyo, JP;
Atsushi Fujioka, Tokyo, JP;
Go Yamamoto, Tokyo, JP;
Koutarou Suzuki, Tokyo, JP;
Masayuki Abe, Tokyo, JP;
Tatsuaki Okamoto, Tokyo, JP;
Atsushi Fujioka, Tokyo, JP;
Go Yamamoto, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A signature is generated by a scheme in which x denotes a secret key of a signature generating apparatus, m∈{0, 1}denotes a recovery message, k denotes an arbitrary value, g denotes a generator of a cyclic group G of order q, R represents g∈G, Hrepresents a hash function H: {0, 1}*→{0, 1}, Hrepresents a hash function H: {0, 1}*→{0, 1}that has a variable output length, Hrepresents a hash function H: {0, 1}*→Z, r=H(R, m)|m(+)H(R, H(R, m)), where (+) represents an exclusive-OR operator, t is defined for γ, which depends on r, as t=H(γ), s is defined as s=k−t·x∈Z, and a signature is σ=(r, s).